Apparatus for ventilating fire-rooms



(No Model.)

A. E. AU BRY & G. H. DAWSON. APPARATUS FOR VENTILATING FIRE ROOMS.

N0 515,-9,47. Patented Mar. 6, 1894.

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rn'rns Arena -rrrcal ALVIS E. AUBRY AND GEDRGE H. DAW'SON, OF STOCKTON, CALIFORNIA.

APPARATUS FOR VENTlL ATING FlRE ROCHldQ.

SPEOIFIGATION forming part of Letters Patent No. 515,947, dated March 6, 1894.

Application filed beptember 13, 1893. Serial No. 485,382. (No model.)

T0 on whom it may concern.-

Be it known that we, Anne E. AUBRY and GEORGE H. Dawson, citizens of the United States, residing at Stockton, in the county of San Joaquin and State of California, have invented certain new and useful Improvements in Apparatus for Ventilating Engine- Rooms and Supplying Heated Air to Furnaces; and we do hereby declare the following to beafull, clear, and exact description of said invention, such as will enable others skilled in the art to which it most nearly-appertains to make, use, and practice the same.

This invention relates to an improved apparatus for ventilating engine rooms and supplying heated air to furnaces, the object of our invention being to withdraw the heated air from the fire room, thus causinga continuous circulation of fresh ai rand maintaining the room cool, and to, by suction, convey the warm vitiated air around the Smokestack, so as to re-heat the same, and discharge the hot air directly beneath the grate bars of the furnace so as to supply a heated draft there to, thus not only permitting us to cool the engine room, the heat of which at times is unbearable, but at the same time allowing us to obtain all possible heat from the fuel, as will be hereinafter more fully set forth and described.

Referring to the drawings forming a part of this application, wherein similar letters of reference are used to indicate corresponding parts throughout the entire specification and several viewsFigure l, is a front elevation showing our apparatus in proper position within the engine room. Fig. 2,is a top plan of Fig. 1; and Fig. 3, a detail View of the belt pulleys.

The letter A is used to indicate the furnace, B the boiler thereof and G the stack through which escape the products of 00111- bustion, while D represents the engine or fireroom.

The smokestack, at least a portion thereof, is incased by the drum E, the top of which is closed tightly against the exterior wall of the Smokestack, as shown at a, while the lower end is flared outwardly and left open so as to provide an air inlet 5. Within this casing or drum is inserted the partition plate or wall F, which also surrounds the Smokestack, but is closed at its bottom and open at its top. This partition wall or plate divides the space which would otherwise exist between the interior wall of the drum l1 and exterior wall of the Smokestack, into two passage-ways c, c. The air from the fire room is drawn into passage-way c, and then into passage-way c, and flows around the smoke-stack, by the radiated heat of which the same is heated to a high degree.

lVithin the fire-room D, is located the fan wheel, which is inclosed by the housing A. This fan wheel is rotated by means of the pulley wheel B,which is secured to the shaft C, and said shaft is rotated by pulley wheel D, through the medium of a drive belt, not shown. The belt E, connects wheel B, to pulley wheel F, secu red upon shaft cl, which drives the fan wheel. From the housing extends the air pipe H, which conveys the heated air to the furnace, beneath the grate bars, and said housing is connected to the passage way 0, by air pipe 11. The rotation of the fan wheel creates a suction which draws the heated vitiated air from the fire or engine room into the passage-way c and thence into passage-Way c, from whence itis drawn, after circulating around the heated surface of the Smokestack, by the pipe B, into the housing A and is conveyed beneath the grate bars of the furnace by the pipe H. The course of the circulating air may be readily followed by the arrows 1.

Having thus described our invention, what we claim as new, and desire to secure protection in by Letters Patent, is-

1. In a device for ventilating engine rooms and supplying heated air to a furnace, the combination with the srnoke'stack, the drum secured to the stack and surrounding the lower portion thereof, the upper end of said drum being closed and thelowerend opened, the annular partition plate located between the drum and smoke-stack, thereby forming an inner and outer air-duct outside of said stack, the upper end of said partition plate being open and the lower end closed, the air outlet pipe connecting with the inner airduct, the housing for receiving the air from the air outlet pipe, a suction fan located therein, mechanism for operating said fan and the air pipe leading from said housing of the suction fan to and beneath the grate bars of the furnace, whereby the warm air drawn from the engine room and more highly heated by contact with the smoke-stack is conveyed to the furnace, substantially as described.

2. The combination with the smoke-stack of the furnace, of a drum secured to the stack and entirely surrounding the same, the upper end of the drum being closed and the lower end open, an annular partition plate secured between the drum and outer wall of the stack, said partition plate being open at one end and closed at the other and forming an inner and outer air-circulating space outside of said stack, the housed suction fan for drawing air from the engine room into the air-circulating spaces, an outlet pipe connect- 

